<template>
  <header class="header">
    <h1>todos</h1>
    <input id="toggle-all" class="toggle-all" type="checkbox" v-model='isAll'>
    <label for="toggle-all"></label>
    <input
      class="new-todo"
      placeholder="输入任务名称-回车确认"
      autofocus
      @keydown.enter="enterFn"
      v-model="task"
    />
  </header>
</template>

<script>
export default {
  props: ['list'],
  data(){
    return{
      task:``
    }
  },
  computed:{
    isAll:{
      set(val){
        // console.log(val);
        this.list.forEach( obj => obj.isDone = val )
      },
      get(){
        return this.list.every(item => item.isDone)
      } 
    }
  },
  methods: {
    enterFn(){
    // console.log('我敲了回车'+this.task)
    if(this.task.trim() === ``){
      alert('输入有问题啊')
      return
    }
    this.$emit(`addTask`,this.task)
    this.task=``
    }
  }
 
}
</script>